Maintainer: ‘Hitoshi Iuchi <hiuchi@sfc.keio.ac.jp>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: c(person(given = "Hitoshi",
                      family = "Iuchi",
                      role = c("aut", "cre"),
                      email = "hiuchi@sfc.keio.ac.jp"),
               person(given = c("Rikuhiro", "G."),
                      family = "Yamada",
                      role = "aut"))
as necessary.
Maintainer: ‘Hitoshi Iuchi <hiuchi@sfc.keio.ac.jp>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: c(person(given = "Hitoshi",
                      family = "Iuchi",
                      role = c("aut", "cre"),
                      email = "hiuchi@sfc.keio.ac.jp"),
               person(given = c("Rikuhiro", "G."),
                      family = "Yamada",
                      role = "aut"))
as necessary.